void setup() 
  {pinMode(5, OUTPUT);
   pinMode(16, OUTPUT);
   pinMode(17,OUTPUT);
  }


void loop() {
  digitalWrite(5,HIGH);
  delay((500));
  digitalWrite(5, LOW);
  digitalWrite(17, HIGH);
  delay(500);
  digitalWrite(17, LOW);
  digitalWrite(16, HIGH);
  delay(1000);
  digitalWrite(16, LOW);}